Question

A using declaration does not seem to work with an enum type:

class Sample{     public:         enum Colour {RED, BLUE, GREEN}; }  using Sample::Colour; 

does not work!

Do we need to add a using declaration for every enumerators of enum type? Like below:

using sample::Colour::RED; 

Answer 1

A class does not define a namespace, and therefore "using" isn’t applicable here.

Also, you need to make the enum public.

If you’re trying to use the enum within the same class, here’s an example:

class Sample {  public:   enum Colour { RED, BLUE, GREEN };    void foo(); }  void Sample::foo() {   Colour foo = RED; } 

And to access it from outside the class:

void bar() {   Sample::Colour colour = Sample::RED; }